Liquid receivers, compressors and refrigeration equipment

Abstract

The present invention discloses a liquid reservoir, a compressor and a refrigeration device, wherein the liquid reservoir includes a shell and an air outlet pipe, the air outlet pipe is arranged in the shell, one end of the air outlet pipe extends into the shell and communicates with the interior of the shell, and the other end of the air outlet pipe is used to connect with a pump body assembly; the air outlet pipe is provided with an ejection section, the ejection section includes an inlet section, a contraction section, a throat section, a diffusion section and an outlet section arranged in sequence along the axial direction, the end of the inlet section away from the contraction section is communicated with the interior of the shell, and the end of the outlet section away from the diffusion section is connected to the pump body assembly; the inner diameter of the throat section is smaller than the inlet section and the outlet section, the inner diameter of the contraction section is gradually contracted from the inlet section to the throat section, and the inner diameter of the diffusion section is gradually expanded from the throat section to the outlet section. The liquid reservoir proposed by the present invention is used for a compressor, and when the compressor displacement and speed remain unchanged, it can increase the suction volume of the compressor and improve the energy efficiency of the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to an intake and exhaust structure, a compressor and refrigeration equipment. Background Art

[0002] Energy conservation and environmental protection are two major themes in the refrigeration and air conditioning industry. Given the increasing demand for energy conservation, the energy efficiency rating requirements for air conditioners are also being further improved.

[0003] To this end, technicians in this field are committed to developing a method to increase the cooling capacity of the compressor under certain compressor displacement and speed, so as to achieve the purpose of improving energy efficiency while meeting reliability requirements. Summary of the Invention

[0004] The main purpose of the present invention is to provide a liquid receiver, a compressor and a refrigeration device, aiming to further improve the energy efficiency of the refrigeration device.

[0005] To achieve the above-mentioned object, the present invention provides a liquid reservoir for a compressor having a pump body assembly. The liquid reservoir includes:

[0006] a housing; and

[0007] An air outlet pipe is provided in the housing, one end of the air outlet pipe extends into the housing and communicates with the interior of the housing, and the other end of the air outlet pipe is used to connect with the pump body assembly;

[0008] The air outlet pipe is provided with an ejection section, which includes an inlet section, a contraction section, a throat section, a diffusion section and an outlet section arranged in sequence along the axial direction. The end of the inlet section away from the contraction section is connected to the interior of the shell, and the end of the outlet section away from the diffusion section is connected to the pump body assembly; the inner diameter of the throat section is smaller than the inlet section and the outlet section, the inner diameter of the contraction section is gradually contracted from the inlet section to the throat section, and the inner diameter of the diffusion section is gradually expanded from the throat section to the outlet section.

[0009] Optionally, the inner diameter of the inlet section is defined as D1, the inner diameter of the throat section is defined as D2, and the length of the throat section is defined as L, wherein D2 / D1 is not less than 0.25 and not greater than 0.5;

[0010] L / D2 is not less than 0.8 and not greater than 1.2.

[0011] Optionally, the angle between the inner circumferential wall of the contraction section and the extension line of the inner circumferential wall of the throat section is not less than 15° and not greater than 45°.

[0012] Optionally, the angle between the inner circumferential wall of the diffuser section and the extension line of the inner circumferential wall of the throat section is not less than 8° and not greater than 25°.

[0013] Optionally, the angle between the inner circumferential wall of the contraction section and the extension line of the inner circumferential wall of the throat section is greater than the angle between the inner circumferential wall of the divergence section and the extension line of the inner circumferential wall of the throat section.

[0014] Optionally, the inner diameter D1 of the inlet section is not smaller than the inner diameter D3 of the outlet section.

[0015] Optionally, the inner diameter D1 of the inlet section is not less than 8 mm.

[0016] Optionally, the air outlet pipe includes a ventilation pipe and an exhalation pipe, the ventilation pipe extends along the axis of the shell and is arranged in the shell, one end of the exhalation pipe is connected to the ventilation pipe, and the other end is connected to the pump body assembly;

[0017] The ejection section is arranged on the ventilation pipe, and / or the ejection section is arranged on the exhalation pipe.

[0018] Optionally, a flared section is provided at one end of the ventilation pipe facing the exhalation pipe, the bottom of the shell has a avoidance hole for inserting the exhaust pipe, the outer peripheral wall of the flared section is connected to the peripheral wall of the avoidance hole, one end of the convex air pipe is inserted into the flared section, and the outer peripheral wall of the exhalation pipe is connected to the inner peripheral wall of the flared section.

[0019] The present invention also provides a compressor comprising the liquid accumulator described in any one of the above items.

[0020] The present invention also provides a refrigeration device comprising the compressor as described above.

[0021] The technical solution of the present invention employs an ejector section provided on the outlet pipe of the liquid reservoir. When the gaseous refrigerant in the liquid reservoir cavity flows through the contraction section of the ejector section, the gas flow rate decreases from coarse to fine due to the gradually decreasing inner diameter of the contraction section, which can accelerate the gas flow rate. At the throat section, its inner diameter is the smallest, the dynamic pressure reaches its maximum value, and the static pressure reaches its minimum value. The gaseous refrigerant velocity increases due to the reduction in the flow cross-section area, and the gaseous refrigerant flow rate reaches its maximum value. The entire flow undergoes the pipe contraction process at the same time, so the pressure also decreases at the same time, thereby generating a pressure difference. This pressure difference is used to provide an external suction force for the gaseous refrigerant. As the gaseous refrigerant flows from the throat section to the diverging section, the flow channel area along the gaseous refrigerant to the flow direction gradually increases, reducing energy loss. Thus, when the compressor displacement and speed remain unchanged, the compressor can increase the suction volume of the compressor, increase the suction mass flow rate, reduce suction overheating, and achieve the purpose of improving energy efficiency while meeting reliability requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 This is a structural diagram of an embodiment of a compressor of the present invention;

[0024] Figure 2 is a schematic diagram of an embodiment of a liquid reservoir of the present invention;

[0025] Figure 3 A schematic diagram of an embodiment of a liquid storage device according to the present invention in which the ejection section is provided on the vent pipe;

[0026] Figure 4 Schematic diagram of an embodiment of a liquid storage device according to the present invention in which the ejection section is arranged in the exhalation duct.

[0027] Description of Figure Numbers:

[0028] Label name Label name 100 Reservoir 2011 Entrance section 10 case 2012 Contraction segment 101 Avoidance 2013 throat section 20 Exhaust pipe 2014 Diffusion section 201 Ejector section 2015 Exit section 21 vent tube 30 Filter 211 Flared section 40 Separator 22 expiratory tract 50 intake pipe 1 compressor 200 main housing 300 Pump body assembly 400 Motor components

[0029] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The present invention proposes a liquid reservoir 100, which is usually installed in the suction pipe of the rotary compressor 1 to prevent liquid refrigerant from flowing into the compression chamber of the rotary compressor 1 and causing liquid hammer. The liquid reservoir 100 is fixed to the outside of the main housing 200 of the rotary compressor 1. For example, a bracket can be provided outside the main housing 200 of the rotary compressor 1, a hoop pad can be put on the outer periphery of the liquid reservoir 100, and then the liquid reservoir 100 can be fixed to the bracket by a hoop. It can be understood that the fixing method of the liquid reservoir 100 can be specifically designed according to actual requirements, and the present invention does not impose any special restrictions on this.

[0034] In the embodiment of the present application, the liquid reservoir 100 includes a shell 10 and an air outlet pipe 20, the air outlet pipe 20 is arranged in the shell 10, one end of the air outlet pipe 20 extends into the shell 10 and is connected to the interior of the shell 10, and the other end of the air outlet pipe 20 is used to connect with the pump body assembly 300; the air outlet pipe 20 is provided with an ejection section 201, and the ejection section 201 includes an inlet section 2011, a contraction section 2012, a throat section 2013, a diffusion section 2014 and an outlet section 201 arranged in sequence along the axial direction. 5. The end of the inlet section 2011 away from the contraction section 2012 is communicated with the interior of the housing 10, and the end of the outlet section 2015 away from the diffusion section 2014 is connected to the pump body assembly 300; the inner diameter of the throat section 2013 is smaller than that of the inlet section 2011 and the outlet section 2015, the inner diameter of the contraction section 2012 is gradually contracted from the inlet section 2011 to the throat section 2013, and the inner diameter of the diffusion section 2014 is gradually expanded from the throat section 2013 to the outlet section 2015.

[0035] Alternatively, as Figure 1 and Figure 2 As shown, the housing 10 of the liquid reservoir 100 has a liquid storage cavity inside, and the liquid reservoir 100 also includes an air intake pipe 50, a filter 30, and a separation plate 40. For example, the housing 10 is arranged vertically, and the air intake pipe 50 is provided at the top of the housing 10. For example, the air intake pipe 50 can be arranged coaxially with the housing 10, and one end of the air intake pipe 50 (for example, Figure 2 The lower end of the air outlet pipe 20 extends into the shell 10 to communicate with the interior of the shell 10, so that the refrigerant can enter the interior of the shell 10 through the air inlet pipe 50. The air outlet pipe 20 is vertically arranged at the bottom of the shell 10. For example, the air outlet pipe 20 can be coaxially arranged with the shell 10. One end of the air outlet pipe 20 (for example, Figure 2 The filter 30 is horizontally arranged in the housing 10 and is located between the lower end of the inlet pipe 50 and the upper end of the outlet pipe 20 to filter the refrigerant entering the housing 10 from the inlet pipe 50. The filtered gaseous refrigerant is discharged into the pump body assembly 300 through the outlet pipe 20. The separator 40 is arranged at the lower end of the filter 30 and is sleeved on the outer periphery of the outlet pipe 20. The outer peripheral wall of the separator 40 is connected to the housing 10 to further support and position the free end of the outlet pipe 20. Of course, the specific arrangement of the inlet pipe 50 and the outlet pipe 20 can be adaptively changed according to different structures of the liquid reservoir 100. For example, the inlet pipe 50 and the outlet pipe 20 can also be arranged coaxially with the housing 10, or the inlet pipe 50 and the outlet pipe 20 can also be arranged obliquely on the housing 10. The present invention is not specifically limited to this.

[0036] Furthermore, the outlet pipe 20 includes an ejection section 201, which is integrally formed with an inlet section 2011, a contraction section 2012, a throat section 2013, a diffuser section 2014, and an outlet section 2015, which are sequentially arranged axially. The internal passageways of the inlet section 2011, the contraction section 2012, the diffuser section 2014, and the outlet section 2015 are coaxially arranged to reduce the flow resistance of the gaseous refrigerant and reduce energy loss during the flow process. It should be noted that the ejection section 201 can be just one section of the outlet pipe 20, located at one end of the entire outlet pipe 20, or a middle section of the outlet pipe 20. For example, taking the ejection section 201 placed in the middle of the entire air outlet pipe 20 as an example, the drainage pipes arranged on both sides of the axial direction of the ejection section 201 are defined as the first pipe section and the second pipe section, respectively. The first pipe section is connected to the inlet section 2011, and the second pipe section is connected to the outlet section 2015. The inner diameter of the first pipe section can be the same as that of the inlet section 2011, or it can be larger or smaller than the inner diameter of the inlet section 2011. Correspondingly, the inner diameter of the second pipe section can also be larger or smaller than the inner diameter of the outlet section 2015, which is not limited here. In this embodiment, if Figures 1 to 4As shown, considering the difficulty of manufacturing the entire outlet pipe 20, the inner diameter of the first pipe section is the same as the inner diameter of the inlet section 2011, and the outer diameter of the first pipe section is also the same as the outer diameter of the inlet section 2011. That is, the first pipe section as a whole is equivalent to an extension of the inlet section 2011. Correspondingly, the inner diameter of the second pipe section is the same as the inner diameter of the outlet section 2015. That is, the second pipe section is equivalent to an extension of the outlet section 2015. It should be further explained that the first pipe section and the second pipe section can be straight pipes or curved pipes, etc., which is not limited here. The specific setting can be based on the relative position of the liquid accumulator 100 and the compressor 1, and is not limited here.

[0037] In the technical solution of this embodiment, when the gaseous refrigerant in the liquid storage chamber flows through the contraction section 2012 of the outlet pipe 20, the gas flow rate decreases from coarse to fine due to the gradually decreasing inner diameter of the contraction section 2012, which can accelerate the gas flow rate. At the throat section 2013, its inner diameter is the smallest, the dynamic pressure reaches its maximum value, and the static pressure reaches its minimum value. The gaseous refrigerant velocity increases due to the reduction in the cross-sectional area of ​​the flow, and the gaseous refrigerant flow rate reaches its maximum value. The entire flow undergoes the pipe contraction process at the same time, and the pressure also decreases at the same time, thereby generating a pressure difference. This pressure difference provides an external suction force for the gaseous refrigerant. As the gaseous refrigerant flows from the throat section 2013 to the divergence section 2014, the flow path area along the gaseous refrigerant flow direction gradually increases, reducing energy loss. Therefore, when the displacement and speed of the compressor 1 remain constant, more gaseous refrigerant enters the pump assembly 300 per unit time, that is, the suction volume of the compressor 1 per unit time increases, increasing the suction mass flow rate. At the same time, as the flow rate of the gaseous refrigerant increases, the time it takes to be heated is reduced, which reduces suction overheating and achieves the goal of improving energy efficiency while meeting reliability requirements.

[0038] In one embodiment, the inner diameter of the inlet section 2011 is defined as D1, the inner diameter of the throat section 2013 is defined as D2, and the length of the throat section 2013 is defined as L, wherein D2 / D1 is not less than 0.25 and not greater than 0.5; L / D2 is not less than 0.8 and not greater than 1.2.

[0039] It should be noted that the inventors have verified through experiments that, under certain conditions, as the length L of throat section 2013 increases, the pressure inside throat section 2013 first decreases and then increases; and as the inner diameter of the throat gradually decreases, the throat pressure gradually increases. The value of D2 / D1 can be 0.25, 0.3, 0.4, 0.45, 0.5, or any value therebetween. Accordingly, the ratio L / D2 can be 0.8, 0.9, 1.0, 1.1, 1.2, or any value therebetween. The inventors have verified through experiments that when the ratio D2 / D1 is within the aforementioned range, and the ratio of the length L of the throat section 2013 to its inner diameter D2 is between 0.8 and 1.2, the pressure at the throat is not excessively high. In this case, the wall thickness of the throat section 2013 can be designed to be correspondingly smaller. Generally speaking, to facilitate the production and processing of the outlet pipe 20, the wall thickness of each portion of the outlet pipe 20 is consistent. Specifically, the outer wall of the contracting section 2012 gradually converges from the inlet section 2011 to the throat section 2013, while the outer wall of the diverging section 2014 gradually expands from the throat section 2013 to the outlet section 2015. This configuration allows the outlet pipe 20 to be designed as a metal tube with a thickness of less than 1 mm. In this embodiment, the thickness of the outlet pipe 20 is 0.8 mm.

[0040] In one embodiment, the angle between the inner circumferential wall of the contraction section 2012 and the extension line of the inner circumferential wall of the throat section 2013 is not less than 15° and not greater than 45°.

[0041] It can be understood that when the inner diameter of the inlet section 2011 and the inner diameter of the throat section 2013 are constant, the angle between the inner circumferential wall of the contraction section 2012 and the extension line of the inner circumferential wall of the throat section 2013 is defined as a. The smaller the angle a, the longer the contraction section 2012 and the smoother the gas flow. That is, when the angle a is too small, when the gaseous refrigerant reaches the throat section 2013, it gradually fails to accelerate and cannot form a negative pressure in the throat section 2013. Therefore, in this embodiment, the angle a between the inner circumferential wall of the contraction section 2012 and the extension line of the inner circumferential wall of the throat section 2013 can be 15°, 20°, 30°, 35°, 40°, 45° or any value therebetween to ensure that the gaseous refrigerant can form a negative pressure in the throat section 2013 and increase the flow rate of the gaseous refrigerant.

[0042] Furthermore, the angle b between the inner circumferential wall of the diffuser section 2014 and the extension line of the inner circumferential wall of the throat section 2013 is positioned, and b is not less than 8° and not greater than 25°. For example, b is 8°, 10°, 12°, 15°, 20°, 25°, or any value therebetween. At this time, the gaseous refrigerant in the throat section 2013 gradually flows into the outlet section 2015 along the diffuser section 2014, which can prevent the increase in the flow rate of the gaseous refrigerant in the throat section 2013 and the resulting excessive pressure fluctuation when entering the outlet section 2015, and the overall production of the air outlet pipe 20 is simpler.

[0043] In one embodiment, the angle between the inner circumferential wall of the contraction section 2012 and the extension line of the inner circumferential wall of the throat section 2013 is greater than the angle between the inner circumferential wall of the diffusion section 2014 and the extension line of the inner circumferential wall of the throat section 2013, that is, a>b. This arrangement ensures that when the gaseous refrigerant accelerated by the throat section 2013 flows to the outlet section 2015 of the outlet pipe 20, its flow rate is greater than the flow rate of the gaseous refrigerant placed in the inlet section 2011, ensuring that the flow rate of the gaseous refrigerant entering the compressor 1 increases, and more gaseous refrigerant enters the pump body assembly 300 per unit time, thereby improving the cooling capacity.

[0044] In one embodiment, the inner diameter D1 of the inlet section 2011 is not less than the inner diameter D3 of the outlet section 2015 .

[0045] It can be understood that if the inner diameter D1 of the inlet section 2011 is smaller than the inner diameter of the outlet section 2015, when the gaseous refrigerant pressurized by the throat section 2013 is guided into the outlet section 2015 through the diffusion section 2014, if the inner diameter of the outlet section 2015 is larger than the inner diameter of the inlet section 2011, when the gaseous refrigerant forms a negative pressure in the throat section 2013, it is easy to suck the refrigerant placed in the outlet section 2015 back into the throat section 2013. Therefore, in this embodiment, by making the inner diameter D1 of the inlet section 2011 not less than the inner diameter D3 of the outlet section 2015, the normal operation of the air outlet pipe 20 is guaranteed, and the reliability of the liquid storage device 100 is improved.

[0046] In one embodiment, in the liquid accumulator 100 according to claim 6, the inner diameter D1 of the inlet section 2011 is not less than 8 mm. For example, D1 can be 8 mm, 9 mm, 10 mm, 12 mm, 20 mm, and so on, without limitation. This design ensures that the flow rate of the gaseous refrigerant entering the compressor 1 from the outlet pipe 20 meets the operating requirements of the compressor 1. Furthermore, the overall processing difficulty of the ejection section 201 of the outlet pipe 20 is relatively low, and the structural strength is higher.

[0047] In one embodiment, the air outlet pipe 20 includes a ventilation pipe 21 and an exhalation pipe 22, the ventilation pipe 21 extends along the axis of the shell 10 and is arranged in the shell 10, one end of the exhalation pipe 22 is connected to the ventilation pipe 21, and the other end is connected to the pump body assembly 300; the introduction section 201 is arranged on the ventilation pipe 21, and / or the introduction section 201 is arranged on the exhalation pipe 22.

[0048] In this embodiment, the outlet pipe 20 is composed of two separate pipes. During installation, the vent pipe 21 can be pre-installed inside the housing 10, and then the two ends of the exhaust pipe 22 are connected to the pump body assembly 300 and the vent pipe 21 respectively to complete the assembly of the liquid reservoir 100, making the installation of the liquid reservoir 100 simpler and more convenient. Figure 2 and Figure 3 As shown, the ventilation pipe 21 has the introduction section 201, and the exhalation pipe 22 is not provided with the introduction section 201. Alternatively, as Figure 4 As shown, the discharge pipe 22 is provided with an ejection section 201, while the vent pipe 21 is not provided with an ejection section 201. Both of these can achieve the effect of increasing the flow rate of the gaseous refrigerant entering the pump body assembly 300. In other embodiments, the ejection section 201 can also be provided in both the vent pipe 21 and the discharge pipe 22. The gaseous refrigerant in the liquid reservoir 100 flows through the vent pipe 21 and enters the discharge pipe 22 after being accelerated once. The ejection section 201 in the discharge pipe 22 performs a second acceleration on the gaseous refrigerant before entering the pump body assembly 300, further increasing the flow rate of the gas.

[0049] In one embodiment, a flared section 211 is provided at one end of the vent pipe 21 facing the exhaust pipe 22, and the bottom of the shell 10 has a avoidance hole for inserting the exhaust pipe 20. The outer peripheral wall of the flared section 211 is welded to the peripheral wall of the avoidance hole, one end of the exhaust pipe is inserted into the flared section 211, and the outer peripheral wall of the exhaust pipe 22 is connected to the inner peripheral wall of the flared section 211.

[0050] like Figure 3 As shown, the bottom end of the vent pipe 21 is expanded outward to form a flared section 211. The size of the flared section 211 is designed to match the size of the avoidance hole. The flared section 211 is fixed to the avoidance hole position of the shell 10 by welding and sealing. The corresponding inner diameter of the flared section 211 is matched with the outer diameter of the exhalation pipe 22. The outer diameter of the exhalation pipe 22 is set in close proximity to the inner diameter of the flared section 211. One end of the exhalation pipe 22 is inserted into the flared section 211 and is fixed and connected to the flared section 211 by welding. The other end of the exhalation pipe 22 is connected to the air inlet of the pump body assembly 300, and is used to transport the gaseous refrigerant in the liquid reservoir 100 to the pump body assembly 300. With this design, the sealing performance of the entire liquid reservoir 100 is better and the stability is higher.

[0051] In this embodiment, the liquid reservoir 100 is placed on one side of the compressor 1, and the discharge pipe 22 is configured as a bend, such as a 90° bend, so that when the resistance in the discharge pipe 22 is small, the connection between the liquid reservoir 100 and the pump assembly 300 is more convenient. When the ejection section 201 is provided on the discharge pipe 22, as a preferred embodiment, Figure 2 As shown, the ejector tube is divided into a vertical section, a horizontal section, and an elbow section connecting the vertical section and the horizontal section. The ejector section 201 is directly arranged on the horizontal section, so that the outlet section 2015 of the ejector section 201 is directly connected to the pump body assembly 300, and the processing of the ejector section 201 is simpler and more convenient.

[0052] It should be noted that, in other embodiments, the inner peripheral wall of the flared section 211 may be provided with an internal thread, and the outer peripheral wall of the exhalation pipe 22 at one end close to the ventilation pipe 21 may be provided with an external thread. It is also feasible that the ventilation pipe 21 and the exhalation pipe 22 are threadedly connected and fixed together. The specific connection structure is not limited here one by one.

[0053] The present invention also proposes a compressor 1, which includes a liquid reservoir 100. The specific structure of the liquid reservoir 100 refers to the above-mentioned embodiment. Since the present compressor 1 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described in detail here. The compressor 1 also includes a main housing 200 component, a base, and a pump body assembly 300 and a motor assembly 400 installed in the main housing 200. Its specific structure refers to the existing technology and is not limited here. The liquid reservoir 100 can be installed inside the main housing 200 or outside the main housing 200, which is not limited here. In this embodiment, Figure 1 As shown, the liquid reservoir 100 is provided on one side of the main housing 200 .

[0054] The present invention also provides a refrigeration device, which includes a compressor 1. The specific structure of the compressor 1 is based on the above-mentioned embodiments. Since the present refrigeration device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described in detail here. The above description is only a preferred embodiment of the present invention and does not limit the scope of the patent of the present invention. All equivalent structural transformations made by using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields, are included in the scope of patent protection of the present invention.

Claims

1. A liquid accumulator for a compressor having a pump assembly, characterized in that: The liquid reservoir comprises: a housing; and An air outlet pipe is provided in the housing, one end of the air outlet pipe extends into the housing and communicates with the interior of the housing, and the other end of the air outlet pipe is used to connect with the pump body assembly; The air outlet pipe is provided with an ejection section, and the ejection section includes an inlet section, a contraction section, a throat section, a diffusion section and an outlet section arranged in sequence along the axial direction, the inlet section is communicated with the interior of the shell at one end away from the contraction section, and the outlet section is connected to the pump body assembly at one end away from the diffusion section; the inner diameter of the throat section is smaller than the inlet section and the outlet section, the inner diameter of the contraction section is gradually contracted from the inlet section to the throat section, and the inner diameter of the diffusion section is gradually expanded from the throat section to the outlet section; the angle between the inner circumferential wall of the contraction section and the extension line of the inner circumferential wall of the throat section is greater than the angle between the inner circumferential wall of the diffusion section and the extension line of the inner circumferential wall of the throat section; The inner diameter of the inlet section is D1, the inner diameter of the throat section is D2, and the length of the throat section is L, wherein D2 / D1 is not less than 0.25 and not greater than 0.5; L / D2 is not less than 0.8 and not greater than 1.2, so as to reduce the pressure at the throat section, and the wall thickness of the outlet pipe is not greater than 1 mm.

2. The liquid reservoir according to claim 1, wherein The angle between the inner circumferential wall of the contraction section and the extension line of the inner circumferential wall of the throat section is not less than 15° and not greater than 45°.

3. The liquid reservoir according to claim 2, wherein The angle between the inner circumferential wall of the diffuser section and the extension line of the inner circumferential wall of the throat section is not less than 8° and not greater than 25°.

4. The liquid reservoir according to claim 1, wherein The inner diameter D1 of the inlet section is not smaller than the inner diameter D3 of the outlet section.

5. The liquid reservoir according to claim 4, wherein The inner diameter D1 of the inlet section is not less than 8 mm.

6. The liquid storage device according to any one of claims 1 to 5, characterized in that The exhaust pipe includes a ventilation pipe and an exhalation pipe, the ventilation pipe extends along the axis of the shell and is arranged in the shell, one end of the exhalation pipe is connected to the ventilation pipe, and the other end is connected to the pump body assembly; The ejection section is arranged on the ventilation pipe, and / or the ejection section is arranged on the exhalation pipe.

7. The liquid reservoir according to claim 6, wherein The ventilation pipe is provided with a flared section at one end facing the exhalation pipe, and the bottom of the shell has an avoidance hole for inserting the exhaust pipe, the outer peripheral wall of the flared section is connected to the peripheral wall of the avoidance hole, one end of the exhalation pipe is inserted into the flared section, and the outer peripheral wall of the exhalation pipe is connected to the inner peripheral wall of the flared section.

8. A compressor, characterized in that: Comprising the liquid reservoir according to any one of claims 1-7.

9. A refrigeration device, characterized in that: Comprising the compressor of claim 8.

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